Ladder foot



F. J. RYNERSON.

LADDER FOOT. APPLICATION FILED OCT. 11, 1919.

Patented May 23, 1922.

entree s r are rare-tit FEED J'. RYNERSON, 01E SAN DIEGO, CALIFORNIA.

. LADDER FOOT.

misses.

T 0 all whom it may concern:

Be it known-that I, FRED J. RYNnesoN, a citizen of the United States, residing at San Diego, in the county of San Diego and State of California, have invented new and useful Improvements in Ladder Feet, of which the following is a specification.

This invention relates to attachments for ladders and has for an object the provision of an attachment which may be secured to the lower end of the legs of a ladder to prevent the same from slipping or marring the surface upon which the ladder may rest.

Another object is the provision of a device of this character Which will adjust itself to uneven surfaces and to the inclination at which the ladder may be placed, at the same time maintaining a firm and even contact with said surface.

A still further object is the provision of means by which the supporting feet which are included in the invention, may be changed, so as to adapt them to various places or positions.

Other objects and advantages of the invention will appear as the following descrip tion is read in connection with the accom p'anying drawings.

In the drawings:

Figure 1 is a front elevation of the lower portion of the ladder showing my device applied thereto. igure 2 is an elevation taken at right angles to Figure 1 on a larger cale and showing the ladder foot device.

Figure 3 is an enlarged longitudinal sectional view on the line of Figure 1 and, Figure 4; is a fragmentary detail view of a portion of the foot.

Referring more particularly to the drawings the numeral 14 designates the sides of a ladder upon which my non-slipping foot is designed to be engaged. In carrying out my invention I provide a foot structure which includes a socket member formed as a pair of plates 29 spaced apart and connected at one edge by a web, these plates being designed to be engaged upon opposite sides of each foot or side 14 of the ladder. The plates 29 are formed with holes 13 for the passage of suitable screws or other securing members whereby to be secured upon the ladder. At the lower edges the plate members 29 are formed substantially centrally with reduced extensions 30 which are of somewhat spherical hollow formation and which are provided at their edges with re- Specification of Letters Patent. 'P{ti3 811f(l liillEtw g3, yaw g Application filed October 11, 1919.

Serial 1T0. 329,898.

cesses 31. The numeral 18 designates the :toot proper which includes a block or base portion 32 upon the lower side of which is suitably secured a tread member 33 which may be formed of rubber which is preferably corrugated or toothed whereby to provide a non-slipping surface. The upper portion of the base or block 32 is formed with a concavity 3 1 receiving the partially spherical projections 30 and the base or block 32 1s furthermore formed with a central recess 37 which receives a stem 35 which is formed on a half ball 36 which is engaged within the mating partially spherical. members 30 of the plates 29. i

From this construction it will be seen that when the plates 29 are secured upon the sidesof a ladder with the semi-balls 3G engaged in position within the mating socket members 30 and the stem engaged within the recess 37 the ladder will have free movement with respect to the feet members 18 while at the same time slipping of the lad der upon any surface upon which it is dis posed will. be prevented. It is highly desirable to provide a set screw 38 which is screwed into the base 32 and which engages the stem 35 whereby to prevent disengagement of the foot member 18 from the plates 29 when the latter are secured upon the sides of the ladder.

From the foregoing description and a study of the drawings it will be readilv apparent that I have thus provided a simply constructed and consequently inexpensive foot attachment for ladders which will elliciently operate to prevent slipping of the ladder regardless of the surface upon which it is supporteiil. (living to the simplicity of the construction and the fewness of the parts it is apparent that there IS practically nothing to get out of order and that the device should consequently have a long life and satisfactorily perform all the functions for which it is intended.

While I have shown and described the preferred embodiment of the invention it is of course to be understood that I reserve the right to make such changes in the form, construction and arrangement of parts as will not depart from the spirit of the invention or the scope of the subjoincd claim.

Having thus described my invention I claim:

A ladder foot comprising a pair of plates secured upon opposite sides of each leg of a ladder, said plates having their lower ends formed With extensions of eoncavo-convex form mating to define a substantially hemispherical socket, a block associated With each pair of plates and formed in its upper face with a partially spherical concavity receiving the assembled socket members, the block being further formed with a bore leading into the concavity and a half-ball member fitting Within said socket and having a stem 10 secured within said bore.

I Intestimony whereof I afiix my signature.

FRED J. RYNERSON. 

